ltc payments

public/admin-invoice-form.js

@@ -25,4 +25,64 @@
         e.target.closest('tr.item-row').remove();
         reindex();
     });
+
+    // --- Litecoin: live rate fetch + auto amount ------------------------
+    const rateInput = document.getElementById('ltc_rate');
+    const amountInput = document.getElementById('ltc_amount');
+    const fetchBtn = document.getElementById('fetch-ltc-rate');
+    const rateStatus = document.getElementById('ltc-rate-status');
+    const rateCcy = document.getElementById('ltc-rate-ccy');
+    const currencySel = document.getElementById('currency');
+    const gelRateInput = document.getElementById('gel_rate');
+
+    function invoiceTotal() {
+        let total = 0;
+        tbody.querySelectorAll('tr.item-row').forEach((row) => {
+            const inputs = row.querySelectorAll('input');
+            const qty = parseFloat(inputs[1].value) || 0;
+            const unit = parseFloat(inputs[2].value) || 0;
+            total += qty * unit;
+        });
+        return total;
+    }
+
+    // Whether the operator has hand-edited the amount; if so, don't clobber it.
+    let amountTouched = false;
+    if (amountInput) amountInput.addEventListener('input', () => { amountTouched = true; });
+
+    function recomputeAmount() {
+        if (!amountInput || amountTouched) return;
+        const rate = parseFloat(rateInput.value);
+        const total = invoiceTotal();
+        if (rate > 0 && total > 0) {
+            amountInput.value = (total / rate).toFixed(8).replace(/\.?0+$/, '');
+        }
+    }
+
+    function syncCcyLabel() {
+        if (rateCcy && currencySel) rateCcy.textContent = currencySel.value;
+    }
+    syncCcyLabel();
+    if (currencySel) currencySel.addEventListener('change', syncCcyLabel);
+
+    if (rateInput) rateInput.addEventListener('input', recomputeAmount);
+    tbody.addEventListener('input', recomputeAmount);
+
+    if (fetchBtn) {
+        fetchBtn.addEventListener('click', function () {
+            const ccy = currencySel ? currencySel.value : 'USD';
+            const params = new URLSearchParams({ currency: ccy });
+            if (gelRateInput && gelRateInput.value) params.set('gel_rate', gelRateInput.value);
+            rateStatus.textContent = ' fetching…';
+            fetch('/admin/ltc-rate?' + params.toString(), { headers: { Accept: 'application/json' } })
+                .then((r) => r.json().then((j) => ({ ok: r.ok, j })))
+                .then(({ ok, j }) => {
+                    if (!ok) { rateStatus.textContent = ' ' + (j.error || 'failed'); return; }
+                    rateInput.value = j.rate;
+                    rateStatus.textContent = ' ✓ live';
+                    recomputeAmount();
+                })
+                .catch(() => { rateStatus.textContent = ' network error'; });
+        });
+    }
 })();